Variable focal length lens



FIG. 1 is a top rear perspective view of a variable focal length lens;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a top rear perspective view thereof, shown in condition of use with an image pickup device and a microscope disclosed in broken lines to illustrate an environment.

The broken lines showing an image pickup device and a microscope in FIG. 9 represent environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a variable focal length lens, as shown and described. 